Cable (US) conversions

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What is cable (US)?


The cable length (US customary or US Navy) is a nautical unit of length equal to 219.456 meters (1 cable length (US) = 219.456 m), the base unit of length in the International System of Units (SI). It is also equal to approximately 0.219456 kilometers (km) (an SI unit of length), or 0.118496 nautical miles (nmi) (a nautical unit of length), or 720 feet (ft), or 0.1363636 miles (mi) or 240 yards (yd), which are US customary / Imperial units of length.

The cable length unit is named after the length of a ship's anchor cable in the age of sail lasting from the 16th to the mid-19th century.

The cable definition varies depending on the system of units used as follows:

  • One cable length (International) is equal to 0.1 nautical miles or 185.2 meters
  • One cable length (Imperial or Admiralty) is equal to 608 feet or 185.3184 meters
  • One cable length (US customary or US Navy) is equal to 720 feet or 219.456 meters


cables (US)